Fountain-pen cap.



-H. A. MASON.

FOUNTAIN PEN GAP.

APPLIOATION FILED JUNE 11, 1910.

Patented Sept. 12, 1911.

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To all whom it may concern:

Be it known that I, HOSEA A. MASON, a

I citizen of' the United States, residing at Taunton, in the county of- Bristol and State of Massachusetts, have invented a new and useful Fountain-Pen Cap, of which the following is a specification.

It is the object of the present invention to provide an-improved cap for fountain pens and more specifically to embody in such a cap, means for containing and properly feeding, for use, a fluid ink eradicator.

More specifically, the invention resides in the provision in a cap for a fountain pen, of a fluid containing cavity closed by a cap through which projects a stylus over the surface of whichthefluid contained in the cavity is toflow'whenthe device is being used.

The invention aimsfurther to so arran e this stylus that-it acts as a valve to normal y prevent the discharge of the fluid but will readily ermit of such discharge'when pressure is rought to bear against the point or end. j

\Vith the above and other objects in view, the invention resides in the construction and arrangement of parts shown in the accompanying drawings, in which, I

Figure 1 is a perspective view of a fountain pen having a cap embodying the present invention, Fig. 2 is a similar view but showing the closure for the cap removed, Fig.3 is a vertical sectional viewthrough the fountain pen cap illustrating the features of the present invention, Fig. 4 is a horizontal sectional View on the line H of Fig. 3, and, Fig. 5 is a perspective view of the stylus of the device.

In the drawings, the device or cap embodying the present invention is illustrated as having the general exterior appearance of the ordinary cap provided in connection with the ordinary fountain pen and this cap is illustrated as comprising a body 6 by which term the cap will be. hereinafter referred to for the sake of clearness inasmuch as the term cap will be applied to one of the elements of the structure actually embodied in the invention.

I The pen in connection with which the cap 6 is employed, is indicated by the reference character F.

The body 6 is, in carrying out the present invention, formed of slightly greater length than ordinarily and in its surplus length is Specification of Letters Patent. I I Application filed June 11, 1910. serial no. 568,488."

Patented Sept. 12 1911 formed with a bore indicatedby the numeral v 7 which serves not only to contain the eradi- 5 1 eating fluid before'men tion'ed but is; also 'de' signed to perform another function to be presently stated. The end of the body- 6 in which the'bo'rc' 7 is formed is threaded and removably fitted upon thesaid end is a cap 8 which, in effect, closes the bore or cavity 7 although this cap 8, for a urpose to be presently explained, is formed opening 9, loosely, is they stem 10 of a stylus and at its inner end this 'stem is provided with a conical head 11 which seatsagainst the interior surfaceof the cap'8'at t-heclosed end..thereof and performs effectually, the function of a valve.

In order to hold the head 11 normally in position to close the opening 9 and prevent I in its closed. end with .a small opening 9. Fitted in this the discharge of the eradicating fluid" from.

the bore 7 a spring indicated by the numeral 12, is fitted in the bore 7 and bears at one end against the closed'end of this bore and at its opposite end against the head 11.

It/will be observed from an inspection of Fig. 5 of the drawings that the head 11 is formed with a notch 13 and it will further be understood that should the body 6 be inverted with relation to the position illustrated in Fig. 3 of the drawings and the end of the stylus IO'brought to bear against a surface, the'hea d 11- of the stylus would be unseatedfrom the surface of the cap 8 and against the tension of the spring 12 and the fluid containedi'n the bore 7 Would be al-' lowed to How through the notch 13 and along the surface of the said head. of the stylus to the rounded end' 14 thereof, this end being. rubbed over the ink li'ne'to be eradicated.

The cap 8 and the stylus is normally covered by a cap closure indicated byithe numeral 1'5 and removablythreaded upon the .body 6 in the manner illustrated in Fig.

of the drawings. I I From the foregoing descriptionof the invention it will be readily understood that there is, by carrying out the principles of the invention, embodied, in an ordinary fountain pen cap, an effective ink'eradicator appliance whichis always at hand and may be readily used.

Owing to the fact that the head 11 ofythe stylus receives the thrust of the spring 12,

the head is given a frusto conical form, in

order to strengthen the head to receive the thrust of the spring, and in order to make the diameter of the head large enough to ,head 11 being ,ence of the notch 13', however, ,find its way. readily between conical surfaces of the head 11 and the cap engage the spring. This enlargement of the head 11, however, serves to increase the hearing surface between the head 11 and the cap 8. The fluidin the cavity 7, often hardens between the head 11 and the adjacent 8, when the pen isinverted from the position shown in Fig. 3, thereby moistening any hardened accumulations between the head 11 and the cap 8, and making the depression of the stylus a matter easy to be accomplished. 1

What is claimed is A device of the class described comprising a reservoir having a conical inner surface, and provided with an opening; a sprin pressed stylus movable in the opening, an having a conical head seating against the conical surface of the reservoir, to effect a closure of the opening; the head having a peripheral notch, permitting the liquid which is within the reservoir, to enter between the conical, contacting surfaces of the head and the reservoir, thereby to moisten hardened accumulations between the head and the reservoir.

In testimony that I- claim the foregomg as my own, I have hereto afiixed my signa ture in the presence of two witnesses.

' HQSEA A. MASON. Witnesses:

- FREDERICK C. LEONARD,

GEORGE T. RIPLEY. 

